CN101444678B - Multi-overflow circle tower plate - Google Patents
Multi-overflow circle tower plate Download PDFInfo
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- CN101444678B CN101444678B CN2008101628510A CN200810162851A CN101444678B CN 101444678 B CN101444678 B CN 101444678B CN 2008101628510 A CN2008101628510 A CN 2008101628510A CN 200810162851 A CN200810162851 A CN 200810162851A CN 101444678 B CN101444678 B CN 101444678B
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Abstract
The invention provides a multi-overflow circle tower plate, comprising at least a circle tower disc. The center of the circle tower disc is provided with a central supporting pipe which forms a circle tower disc; the circle tower disc is equally divided into sector blocks according to the overflow number; each sector block is divided into three blocks: a liquid receiving disc, a sector tower disc and a liquid falling area; the liquid falling area of the next layer of tower plate is arranged right below the liquid falling area of the circle tower disc; the liquid falling area is connected with the liquid receiving disc of the lower layer of tower plate by a slope; a circle liquid communicating vessel is arranged in the middle of the central supporting pipe of the circle tower disc; the bottom surface of the communication vessel is aligned to the bottom surface of the liquid receiving disc, the top surface thereof is about 50mm higher than the maximum liquid level of the liquid receiving disc, and the external side surface is communicated with the liquid falling pipe. The multi-overflow circle tower plate has the advantages of improving the tower plate efficiency, reducing the pressure reduction of the tower plate, reducing the separation energy dissipation, shortening the dimension of distillation column, reducing the cost of equipment, meeting the high requirement on separation performance of the tower plate during the modernized separation process, and the like.
Description
Invention field
What the present invention relates to is a kind of core component of plate distillation column---column plate, belongs to the vapor-liquid separating device technical field.
Background technology
In the work of petrochemical industry was produced, distillation operation affected the energy consumption of petrochemical industry industry significantly.For example the U.S.'s about 40,000 rectifying column consumed energies in the whole nation in 1989 account for 41.2% of petrochemical industry total energy consumption, account for 2.99% in the national total energy consumption.And plate distillation column accounts for very big proportion in the rectifying column, so the small raising of plate distillation column efficient just can produce huge economic benefit.The research of current rectifying mainly comprises two aspects: distillation process simulation and rectifying device design.The main task of rectifying simulation is exactly to instruct the rectifying device design in theory.Introduce the relation of point efficiency on plate efficiency in the rectifying simulation and the column plate below, and then how to instruct the design column plate.
Following hypothesis is used in the derivation of point efficiency relation on plate efficiency and the column plate.
Plug flow model: consider a two-component fractionation tower, wherein column plate is the certain rectangle column plate of length for every layer, and hypothesis liquid carries out plug-flow on column plate.
Lewis situation 1: suppose that into the gas of column plate mixes fully, promptly column plate gas component everywhere is identical, sees shown in Figure 1.
Lewis situation 2: suppose that gas is unmixed fully between the column plate, promptly gas leaves that the form with piston flow enters the last layer column plate after the liquid on the column plate, and liquid flow direction is identical on all column plates, sees shown in Figure 2.
Lewis situation 3: suppose that gas is unmixed fully between the column plate, promptly gas leaves that the form with piston flow enters the last layer column plate after the liquid on the column plate, but liquid flow direction is opposite on adjacent two blocks of column plates, sees shown in Figure 3.
The hypothesis gas-liquid phase equilibrium is a linear relation in addition in derivation, promptly
Y=mx+b m---gas-liquid phase equilibrium slope y---gas phase molar fraction
X---liquid phase molar fraction E
OG---Murphree gas phase rectifiying plate point efficiency
E
MV---Murphree gas phase rectifiying plate efficient ζ---plate efficiency synergistic factor, ζ=E
MV/ E
OG
L---liquid molar flow rate on the column plate, mol/h V---gas molar flow rate on the column plate, mol/h
The slope of R---operating line, R=L/V λ---the stripping factor, λ=m/R
Concrete theoretical derivation can be seen the 8th chapter content in " the rectifying simulation " that professor Song Haihua writes.
Be that a plate efficiency synergistic factor ζ is with point efficiency E below
OGThe numerical value tables that under different Lewis situations, changes with the stripping factor lambda.
Though the aforementioned calculation model has used several hypothesis, do not lose generality, how more it indicated good utilisation column plate top liquids and gases component difference and improved plate efficiency.But in addition this principle body by two kinds of fluids in the design of heat exchanger adopt adverse current and and when flowing the discrepant characteristics of mean temperature difference understand.
The research and development of column plate now, concentrate on greatly and improve on the column plate liquid flow condition, as pilot hole is set, adopt better circulation type tower plate of flow pattern or the like, and the reflection plate efficiency increases sharply 10%～20% quickly on so slight many data of change and the patent, plate pressure drop reduces 5%～15%, even more.Regrettably Jue Dabufen research and development person does not explain theoretically fully, and in fact is that so slight improvement makes on the column plate liquid flow form near plug-flow, has produced plate efficiency synergistic factor ζ.Yet how to maximize synergistic factor, that be exactly the column plate of design by it more near Lewis situation 2, the efficient of column plate can maximize like this, the efficient of veneer is above 1 also being normal.
The design guidance principle:
(1) liquid adopts piston flow.
(2) gas adopts piston flow.
(3) the liquid flow direction unanimity of levels column plate.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, and maximum these characteristics of the column plate synergistic factor that a kind of Lewis of utilization situation 2 is provided instruct the design column plate and then improve plate efficiency, the pressure that reduces column plate falls, reduce separating energy consumption, dwindle the rectifying column size, thereby reduce equipment cost and satisfy the multi-overflow circle tower plate of modern separation process column plate separating property high request.
The objective of the invention is to be achieved through the following technical solutions, which comprises at least a circular tower tray, the center of described circular tower tray is provided with a central support tube and constitutes an annular tower tray, cut into secter pat according to overflow number equal portions on this annular tower tray, every part of secter pat is cut into seal pot, fan-shaped tower tray again and falls three of liquid zones; Described annular tower tray the liquid zone that falls for one deck column plate down falls under the liquid zone, the described liquid zone that falls joins by the seal pot of a slope with following one deck column plate; Pipe and outer tube in the central support tube of described annular tower tray is divided into; Seal at the top of interior pipe, communicates at the bottom of bottom and the tower, forms an annular region in the middle of outer tube and the interior pipe annular fluid connection device and annular gas linker are set; Be provided with an annular fluid connection device in the middle of the central support tube of described annular tower tray, the bottom surface of this linker and seal pot bottom surface flush, and end face is than the high 50mm of maximum level in the seal pot, and lateral surface and downspout are communicated with; Be provided with an annular gas linker in the middle of the central support tube of described annular tower tray, the bottom surface of this linker is the end face of fluid connection device, and the end face of linker flushes with the upper strata column plate, and the gas compartment of lateral surface and the different sectors of column plate is communicated with.
The central support tube cross-sectional area of described annular tower tray accounts for 1/4～1/16 of whole tower tray cross-sectional area.
The invention belongs to a kind of big improvement to prior art, it has the raising plate efficiency, and the pressure that reduces column plate falls, reduce separating energy consumption, dwindle the rectifying column size, can reduce equipment cost, can satisfy modern separation process characteristics such as column plate separating property high requests.
Description of drawings
Fig. 1 is the illustraton of model of Lewis situation 1.
Fig. 2 is the illustraton of model of Lewis situation 2.
Fig. 3 is the illustraton of model of Lewis situation 3.
Fig. 4 is a structural representation of the present invention.
Fig. 5 is the A-A view of Fig. 4, and wherein: I is interior pipe; II is the gas linker; III is the fluid connection device.
Fig. 6 is the B-B view of Fig. 4, and the design of liquid zone falls in reflection.
The specific embodiment
Below in conjunction with accompanying drawing to structural representation of the present utility model.The utility model includes a circular tower tray at least, the center of described circular tower tray is provided with a central support tube and constitutes an annular tower tray, cut into secter pat according to overflow number equal portions on this annular tower tray, every part of secter pat is cut into seal pot 1, fan-shaped tower tray 3 again and falls 5 three of liquid zones.
Described annular tower tray fall under the liquid zone 5 for one deck column plate down liquid zone 5 falls, the described liquid zone 5 that falls joins by the seal pot 1 of a slope with following one deck column plate.
Is provided with an annular fluid connection device in the middle of the central support tube of described annular tower tray, the bottom surface of this linker and seal pot bottom surface flush, and end face is than in the seal pot about maximum level height～50mm, and lateral surface and downspout are communicated with.
Be provided with an annular gas linker in the middle of the central support tube of described annular tower tray, the bottom surface of this linker is the end face of fluid connection device, and the end face of linker flushes with the upper strata column plate, and the gas compartment of lateral surface and the different sectors of column plate is communicated with.
Pipe and outer tube in the central support tube of described annular tower tray is divided into; Seal at the top of interior pipe, communicates at the bottom of bottom and the tower, forms an annular region in the middle of outer tube and the interior pipe annular fluid connection device and annular gas linker are set.
The central support tube cross-sectional area of described annular tower tray accounts for 1/4～1/16 of whole tower tray cross-sectional area.
Shown in the accompanying drawing 4 is that the overflow number is 3 multi-overflow circle tower plate vertical view, and wherein: 1 is seal pot; 2 is that inlet weir, 3 is that fan-shaped tower tray, 4 is that exit weir, 5 is for falling the liquid zone; 6 is central support tube.
Shown in Figure 5 is: I is interior pipe; II is the gas linker; III is the fluid connection device.
Shown in Figure 6 is: it has reflected the structure of falling the liquid zone.
Shown in above accompanying drawing, with traditional circular tower tray, remove a circle that accounts for whole tower cross-sectional area 1/4～1/16 at the center, place central support tube, obtain an annular tower tray then, annular tower tray is cut into fan-shapedly according to overflow number equal portions, every part fan-shaped is cut into seal pot, fan-shaped tower tray again and falls three of liquid zones again.Liquid flow direction on all fan-shaped tower trays is consistent, all is clockwise or counter clockwise direction.Rotate a circle in the tower plate number of process and overflow number of liquid equates.
Column plate liquid flowing state design: design principle: the liquid that flow out from the inlet weir simultaneously (1) must flow into downspout simultaneously.(2) liquid is made the circular arc line plug-flow on fan-shaped column plate.For meeting above two design principles, carried out following design.Import and exit weir adopt flat weir, the height of weir top margin prolongs radially and reduces slightly from inside to outside, on fan-shaped column plate, pilot hole is set in addition, this pilot hole is to form through for many years improvement research and development on Chinese patent 912070846 bases of my research institute of company, pilot hole is stamped to form on column plate, one horizontal breach is arranged, gas sprays from horizontal breach to liquid and transmits momentum, improve the flowing velocity of liquid and the flow direction of change liquid, this pilot hole set-up mode be prolong fan-shaped column plate radially ecto-entad successively decrease, fan-shaped column plate arranged outside is maximum, the inboard of fan-shaped column plate generally is not provided with, have only when fan-shaped column plate is inboard to form big gradient of liquid level just to be provided with, the particular location of pilot hole and quantity must be by strict calculating.
The design of liquid zone is fallen: fall the liquid zone under for following one deck column plate the liquid zone rather than the seal pot of one deck column plate down fall, liquid is to be sent to the seal pot of one deck column plate down by a slope in falling the liquid zone.The advantage of this design is, liquid can produce still less bubble from the slope of exit weir inflow downspout, thereby reduce gas backmixing, when being moved upward, gas on the tower tray reduces to mix, also handlebar a part of infinite region of falling liquid zone top gives seal pot, thereby has improved the finite region of column plate.
Fluid connection device design: design principle be make with the liquid level of liquid in the different sectors seal pot on one deck column plate consistent with component.Design is to adopt the linker of an annular in central support tube, and the bottom surface of linker and seal pot bottom surface flush, and end face is than in the seal pot about maximum level height～50mm, and lateral surface and downspout are communicated with.This fluid connection device need all not be provided with at every layer of column plate, and certain column plate is provided with one at interval, and suggestion is that 5 layers of column plate are provided with one.
The design of gas linker: design principle is that the pressure with the different sectors of one deck column plate gas is equated.Design also is to adopt the linker of an annular in central support tube, and the bottom surface of linker is the end face of fluid connection device, and the end face of linker flushes with the upper strata column plate, and the gas compartment of lateral surface and the different sectors of column plate is communicated with.Every layer of column plate of this linker all must be provided with.
Central support tube design: pipe and outer tube in this central support tube is divided into; Interior pipe is a stay pipe truly, and seal at the top of interior pipe, communicates at the bottom of bottom and the tower, forms an annular region in the middle of outer tube and the interior pipe fluid connection device and gas linker are set.
Claims (2)
1. multi-overflow circle tower plate, which comprises at least a circular tower tray, the center that it is characterized in that described circular tower tray is provided with a central support tube and constitutes an annular tower tray, cut into secter pat according to overflow number equal portions on this annular tower tray, every part of secter pat is cut into seal pot (1), fan-shaped tower tray (3) again and falls (5) three of liquid zones; Described annular tower tray fall under the liquid zone (5) for one deck column plate down liquid zone (5) falls, the described liquid zone (5) that falls joins by the seal pot of a slope with following one deck column plate; Pipe and outer tube in the central support tube of described annular tower tray is divided into; Seal at the top of interior pipe, communicates at the bottom of bottom and the tower, forms an annular region in the middle of outer tube and the interior pipe annular fluid connection device and annular gas linker are set; Be provided with an annular fluid connection device in the middle of the central support tube of described annular tower tray, the bottom surface of this linker and seal pot bottom surface flush, and end face is than the high 50mm of maximum level in the seal pot, and lateral surface and downspout are communicated with; Be provided with an annular gas linker in the middle of the central support tube of described annular tower tray, the bottom surface of this linker is the end face of fluid connection device, and the end face of linker flushes with the upper strata column plate, and the gas compartment of lateral surface and the different sectors of column plate is communicated with.
2. multi-overflow circle tower plate according to claim 1 is characterized in that the central support tube cross-sectional area of described annular tower tray accounts for 1/4～1/16 of whole tower tray cross-sectional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101628510A CN101444678B (en) | 2008-12-02 | 2008-12-02 | Multi-overflow circle tower plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101628510A CN101444678B (en) | 2008-12-02 | 2008-12-02 | Multi-overflow circle tower plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101444678A CN101444678A (en) | 2009-06-03 |
| CN101444678B true CN101444678B (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101628510A Active CN101444678B (en) | 2008-12-02 | 2008-12-02 | Multi-overflow circle tower plate |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974116B (en) * | 2012-11-29 | 2014-09-03 | 天津大学 | Overflow support device for large-scale plate tower |
| CN103028355B (en) * | 2012-12-24 | 2014-07-30 | 天津市创举化工设备有限公司 | Full overflow tank type liquid distributor |
| CN106759138B (en) * | 2017-02-28 | 2019-01-29 | 武汉大学 | Water-gas combined balance waterpower automatic overflow weir |
| CN111282304A (en) * | 2020-03-28 | 2020-06-16 | 河南恒天久大实业有限公司 | Flash tower tray with gas rising independent channel |
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2008
- 2008-12-02 CN CN2008101628510A patent/CN101444678B/en active Active
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Address after: No.799, Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou oxygen generator group Co.,Ltd. Address before: 310004 No. 388 Dong Xin Road, Xiacheng District, Zhejiang, Hangzhou Patentee before: HANGZHOU HANGYANG Co.,Ltd. |
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Address after: 799 Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee after: Hang Yang Group Co.,Ltd. Address before: 799 Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou oxygen generator group Co.,Ltd. |
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